Pharm drugs by system Flashcards
Calcium-channel blockers
Block voltage-dependent L-type Ca channels, leads to decr. contractility
Dihydropyridines - act on vascular smooth muscle
- amlodipine, nifedipine, nicardipine
Non-DHP - act on cardiac muscle (aka Class IV)
- verapimil, diltiazem
Hydralazine
Vasodilates arterioles > veins, afterload reduction
Frequently co-administered with a B-blocker to prevent reflex tachycardia
Nitroprusside, fenoldopam
Meds in hypertensive emergency
Nitroprusside - short acting, incr. cGMP to incr. NO
Fenoldopam - D1 receptor agonist, systemic vasodilation to decr. BP
Nitroglycerin/nitrates
incr. NO to vasodilate vascular smooth muscle –> incr. cGMP
dilate veins»_space; arteries to decr. preload
treat reflex tachy with BBs
Statins
HMG-CoA reductase inhibs
stop conversion of HMG-CoA to mevalonate (competitive inhibitor)
SE: hepatotoxicity, myopathy
Cholecystyramine
Bile acid resins
prevent reabsorption of bile acids, liver uses cholesterol to make more
decr. absorption of fat-soluble drugs (incr. bleeding times)
Fibrates
upregulate lipoprotein lipase, increased TG clearance
also, activate PPAR-a to induce HDL synthesis
SE: myopathy, cholesterol gallstones
Classes of anti-arrhythmics
I: sodium channel blockers
II: B-blockers
III: potassium channel blockers
IV: calcium channel blockers
lidocaine, mexiletine
Class IB anti-arrhythmics
decr. AP duration - narrow the action potential graph
Best for post-MI
Pioglitazone/risoglitazone
Glitazones
Increase insulin sensitivity in peripheral tissue by binding PPAR-gamma transcription regulator
can cause weight gain from fluid retention
Exenatide
Linagliptin
GLP-1 analog
DPP-4 inhibitor
Both increase insulin and decrease glucagon
Demeclocycline
ADH antagonist (possibly competitive antag)
Used for SIADH
Omeprazole, lansoprazole, pantoprazole
Proton pump inhibitors
Irreversibly inhibit H/K ATPase in parietal cells
decr. serum Mg with chronic use
Ezetimibe
Prevent cholesterol absorption at brush border
Niacin
inhibits lipolysis
SE: red flushed face that decr. with NSAIDs
hyperglycemia, hyperuricemia
Digoxin
direct inhibition of Na/K ATPase
leads to increased contractility and decreased conduction through AV node
Orlistat
inhibits gastric/pancreatic lipase
used for weight loss
Milrinone
phosphodiesterase 3 inhibitor (normally metabolizes cAMP)
in cardiac muscle: incr. cAMP = incr. contractility
in vascular smooth muscle: incr. cAMP = vasodilation
Flutamide
Competitive antagonist for testosterone and DHT receptors in target cells
Used for prostate cancer (in combo with GnRH antags)
Flecainide, propafenone
Class IC anti-arrhythmics
Prolongs ERP in AV node- changes slope of graph, but no change in width
Use for SVTs
Contraindicated in ischemic heart disease
B-blockers
Class II anti-arrhythmics
Decr. cAMP –> decr. automaticity of pacemakers- decr. slope of funny current, wider graph
Use for AVT
SE: metop: dyslipidemia, propran: vasospasm in variant angina
Verapimil, diltiazem
Class IV anti-arrhythmics - L-type Ca channel blockers, non-DHP
slow funny current rise, prolonged repolarization
Aspirin
COX-1, COX-2 inhibitors (irreversible, lasts as long until new plts, 8-10 days)
Can cause gastric ulcers, tinnitus, Reye syndrome with viral infection
Aspart, lispro
Rapid-acting insulin
Cilostazol, dipyridamole
PDE III inhibitor
incr. cAMP –> decr. plt aggregation
Detemir, glargine
Long-acting insulin
Azathioprine/6-MP
purine analog –> block de novo purine synthesis
activated by HGPRT
metabolized by xanthine oxidase
Used to prevent organ rejection, RA, IBD, SLE
Glimepiride, glipizide, glyburide
Sulfonylureas
Close K channels in B cells to stimulate insulin release (so no good in Type 1 DM)
high risk of hypoglycemia
Methotrexate
Folate analog (DHF inhibitor)
Used for everything!
SE: myelosuppresion, hepatotoxicity, mucositis, pulmonary fibrosis
Methimazole
Blocks thyroid peroxidase
Contraindicated in pregnancy!
Conivaptan, tolvaptan
ADH antagonists, block action of ADH at V2 receptor
used in hyponatremia
Desmopressin
Used for central DI
Cinacalcet
Sensitizes CaSR in the parathyroid to serum Ca2+ therefore decreases PTH
Carmustine, lomustine
nitrosureas, alkylating (cross-links DNA)
requires bioactivation by liver
Used for brain tumors (accesses CNS)
Bismuth, sucralfate
Bind to stomach ulcer base, providing physical protection and allowing HCO3 secretion
Misoprostol
PGE1 analog –> incr. mucus barrier, decr. acid production
can cause diarrhea, is contraindicated in women of child-bearing potential
Octreotide
long-acting somatostatin analog
used for acute variceal bleeds, acromegaly, VIPoma, carcinoid tumors
AlOH, CaCO3, MgOH
Antacids
Can cause low K, affect other drugs by altering gastric pH
AlOH: constipation, low PO4
CaCO3: high Ca, rebound acid incr.
MgOH: diarrhea, hyporeflexia, cardiac arrest
Sulfasalazine
Combo of antibacterial and antiinflammatory
Uses for ulcerative colitis and colitis of Crohn’s
Ondansetron
5-HT3 antagonist, decr. vagal stimulation
Central-acting anti-emetic (good for chemo patients)
SE: headache, constipation, QT interval prolongation
Metoclopramide
D2 receptor antagonist –> incr. tone/contractility in gut
Used for diabetic gastroparesis
Incr. risk of tardive dyskinesia
Heparin
Antithrombin activator (decr. II and decr. X)
HIT: development of IgG against PF4, activating platelets –> thrombosis and thrombocytopenia (4 T’s)
Argatroban
direct thrombin inhibitors
Use in HIT sensitive patients
Warfarin
interfere w/ gamma-carboxylation of clotting factors
incr. PT (extrinsic pathway)
skin/tissue necrosis - small vessel microthromboses
Rivaroxaban
Directly inhibit factor Xa
No reversal agent available for bleeding
Alteplase (tPA), streptokinase
Thrombolytics
Incr. plasmin, incr. PT/PTT
Clopidogrel, ticlopidine
ADP receptor inhibitor (prevent expression of GpIIb/IIIa)
ticlopidine can cause neutropenia
Abciximab
GpIIb/IIIa inhibitor
prevent plt aggregation
made from Fab fragments
Cladribine
purine analog
used in hairy cell leukemia
Cytarabine
pyrimidine analog
Used for AML, lymphomas
5-FU
pyrimidine analog, covalently complexes folate (decr. dTMP, decr. DNA synthesis)
Used for colon cancer, pancreatic cancer
Bleomycin
antitumor antibiotic
free radical formation, creates breaks in DNA strand
can cause pulmonary fibrosis, skin hyperpigmentation
Actinomycin D
antitumor antibiotic
intercalates in DNA
used for childhood tumors
Doxorubibin, daunorubicin
antitumor antibiotic
generates free radicals and intercalates in DNA
Busulfan
alkylating (cross-links DNA)
used to ablate bone marrow before BMT